{"type":"post","id":"parse-number-as-a-sqlite-extension-c-vs-378a34","slug":"parse-number-as-a-sqlite-extension-c-vs-378a34","title":"parse_number() as a SQLite extension: C vs Rust","description":"Simon Willison used Claude Opus 5.5 to prototype a SQLite parse_number() extension in C and Rust, then benchmarked the implementations over two million rows.","retrieval_nugget":"Simon Willison used Claude Opus 5.5 to prototype a SQLite parsenumber() extension in C and Rust, then benchmarked the implementations over two million rows. A revised C parser led the reported timings, showing why teams should measure AI-generated systems code instead of inferring its quality from a language choice or a plausible first draft.","published_at":"2026-11-09","updated_at":"2026-11-09","record_date":"2026-11-09","date_kind":"published_at","topics":["claude"],"entities":["Simon Willison","Claude Opus 5.5","SQLite","Rusqlite","sqlite-loadable-rs"],"related_patterns":["verification-bandwidth-is-the-scarce-resource"],"novelty_label":"new_fact","what_changed":"A new benchmark finds a hand-optimized C SQLite parse_number() extension faster than the Rust implementations, at 16–19 ns per row.","prior_refs":[],"source_url":"https://simonwillison.net/2026/Nov/8/sqlite-parse-number-c-vs-rust","source_urls":["https://simonwillison.net/2026/Nov/8/sqlite-parse-number-c-vs-rust"],"schema_version":"newruntime-agent-readable-v0.2","stable_id":"post:parse-number-as-a-sqlite-extension-c-vs-378a34","status":"published","visuals":[],"editor":{"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]},"routes":{"html":"https://newruntime.com/posts/parse-number-as-a-sqlite-extension-c-vs-378a34/","markdown":"https://newruntime.com/posts/parse-number-as-a-sqlite-extension-c-vs-378a34.md","json":"https://newruntime.com/posts/parse-number-as-a-sqlite-extension-c-vs-378a34.json"},"markdown_url":"https://newruntime.com/posts/parse-number-as-a-sqlite-extension-c-vs-378a34.md","next_reads":[{"type":"topic","path":"/topics/claude/","url":"https://newruntime.com/topics/claude/","title":"Claude","reason":"Explore the claude topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/claude.md","json_url":"https://newruntime.com/topics/claude.json"},{"type":"collection","path":"/posts/","url":"https://newruntime.com/posts/","title":"Field Notes","reason":"Open the latest editorial analysis.","media_type":"text/html","json_url":"https://newruntime.com/posts.json"},{"type":"collection","path":"/sources/","url":"https://newruntime.com/sources/","title":"Sources","reason":"See the original sources this archive cites.","media_type":"text/html"}]}